Hard to separate

• Gottesman suggested people have a reaction range, meaning everyone has a certain genetic potential for things like intelligence
• Environment determines how much potential is fulfilled
• Diathesis stress model suggests people have genetic predispositions for disorders like schizophrenia
• Person with higher diathesis more likely to develop trait
• One influence can sometimes override another
• Plomin et al three types of genotype-environmental correlations

  1. Passive - similar genes likely to experience similar environments
  2. Reactive - Genetically determined characteristics may shape a person's experience
  3. Active - people with particular inherited tendencies might seek out certain environments then shaping behaviour just as genes do